Thread: Build Log Flying Wing Revisited
View Single Post
Old Dec 08, 2012, 07:02 PM
Tom Harper is offline
Find More Posts by Tom Harper
Lift is cheap - Drag sucks
Tom Harper's Avatar
Socorro, NM
Joined Jul 2004
3,717 Posts
Development

Nice 5.2 km flight today. Got some more data:

Max airspeed - 107 kmh
Stall speed - 45 kmh
7 Amps cruise current (60kmh)
76 Watts cruise power (60 kmh)

It takes about 500 mah for take off and landing, so the range on a single 1600mah lipo is 12 km at 60 kmh. I used two cells today for safety.

The aerial photos are useful for data but are not 'good'. On autopilot the model is oscillating 20 degrees or more in roll causing some blur. I have to change the linkage gain and work on the autopilot constants.

We were losing power due to vibration in the temporary motor mount and the damaged motor. Eliminating the oscillations and removing one lipo may get cruise current down to 6 or even 5 Amps.

Tom
Tom Harper is offline Find More Posts by Tom Harper
Reply With Quote